LOCATION.--Lat 40°33'25.5", long
74°09'17.8" referenced to North American Datum of
1983, Richmond County, NY, Hydrologic Unit 02030104, at
northeast corner of Everton Avenue and Leverett Avenue,
southernmost well, Great Kills, Staten Island.
WELL CHARACTERISTICS.--Depth 201 ft. Upper casing
diameter 4 in; top of first opening 196 ft, bottom of last
opening 201 ft.
DATUM.--Land-surface datum is 44 ft above National
Geodetic Vertical Datum of 1929. Measuring point: Top of
casing, 0.47 ft below land-surface datum, 43.53 ft above
land-surface datum, Feb. 3, 2005 to Sep. 17, 2024; Top of
casing, 0.47 ft below land-surface datum, 42.01 ft above
land-surface datum, Sep. 17, 2024 to present.
PERIOD OF RECORD.--February 2005 to current year.
GAGE.--Periodic manual measurements by USGS
personnel.
EXTREMES FOR PERIOD OF RECORD.--Highest water level
measured, 6.32 ft above NGVD of 1929, June 29, 2012; lowest
measured, 4.73 ft above NGVD of 1929, Jan. 4, 2006.